Radiant heating unit



June 30, 1925. 1,543,721

J. H. PROCTER RADIANT HEATING UNIT Filed Jum xe 50, 1923 Fig F/g ZWITNESSESz' 1 23 INVENTOR alifl" Jasepfi h. D'xtcn ATTORNEY.

mama June 30, 1925. 1,543,721 UNITED STATES PATENT OFFICE.

JOSEPH H. PROCTER, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WISTING-HOUSE ELECTRIC 6; MANUFACTURING COMPANY, A CORPORATION OF PENN- mVANIA.

RADIANT HEATING UNIT.

. Application filed June 30, 1828. Serial No. 848,700. To all whom itmay concern: members may be built up either by the use Be it known thatI, Josnerr H. Paco-ran, a of punched sheet metal members or by thecitizen of the United States, and a resident use of castings and may beof any suitable of Wilkinsburg, in the county of Allegheny design andcontour to provide a heater of a.

I and State of Pennsylvania, have invented a pleasing and ornamentalappearance.

new and useful Improvement in Radiant The casing 12 is provided with adepressed Heating Units, of which the following is a front portion 16having an opening 17 therespecification. in. A protecting grating 18comprising a My invention relates to electrically heated plurality ofvertically and of horizontally devices and particularly to electric airheatextending rods is removably mounted in the ers of the radiant type.casing 12 in the depressed portion 16 thereof. One object of myinvention is to provide A reflector plate 19 of a suitable refracarelatively simple and compact electric air tory material is locatedwithin the casing 12 heater comprising a plurality of luminously k ff-hefront opening 17 and may be radiant refractory skeleton frames. uppo tedon a refractory plate 21 that ex- A th bj t f y i ti i t tends laterallyof the casing 12 below the vide an electric air heater comprising a.plufront p grality of embedded electric heating elements. A plurality ofskeleton frames 22, of re- In practicing my invention, I provide a.fractory electric-insulating material, are 10- suitable casing having afront openlng there- Gated n h ing 12 in front of the plate in. Aplurality of relatively light skeleton 19 n may e located on andsupported frames of refractory electric-insulating maby he plate 21,each of the members 22 havterial are located in said casing back of saidg a i le base portion 23 fitting into front opening and are severally roid d suitable openings 24. in the member 21 to with an embedded electricheating member p op y p e th m in adjacent spaced remounted therein, Areflector plate of relation relatively to each other. The upper fractorymaterial is located in said casin ends of the members 22 may comprise aflatb k f id di t heating it A tened extension 25 that operativelyengages trol switch is provided to permit of controle rear surface of arefractory member 26 ling the energization of the heating units. tlocated 111 the upper portion of the In the single sheet of drawings,easlng 12. The member 26 extends laterally Figure 1 is a view, in frontelevation, of Wlth respect to the {l 22 and 1s S0 an electric air heamrmy invencated the eXtBIlSlOl'lS are between ti the upper edge of theplate Mind the rear Fig. 2 is a view in vertical lateral section Surfaceof the member therethrough, taken on the line II-II of h t n frames 22may comprise a Fi 1, I relatively thln rear wall 27, side flanges 28,Fig. 3 i a vi w, in f t l ti f and a lurahty of bridges 29 that extendskeleton frame comprising the device emangular y from one flange 28 t0the other, b dyi my i e ti n, substantially as illustrated in Fig. 3 ofthe Fig. 4 is a view, in vertical longitudinal d mgsection therethrough.taken on the line A heating element 31 is located in the IV-IV of Fig.3, and bridges 29 which are provided with connect- Fig. 5 is a view, inlateral section, throu h mg gr oves 32 to permit of the Wire 31 being at. f th k l t f m ill tr ted in placed therein and held therein by afilling Fig. 3, taken on the line VV thereof. 33 of a suitablerefractory material. By An electric heater 11 comprises a suitableproviding the groove 32 in each of the casing 12 located on a base 13havin a plubridges 29, it is possible to em loy a heating rality ofsupporting members 14. A cover element havin a length muc greater thanmember 15 is rovided for the casing 12 and that of the e ongated member22, thereb it may be made removable therefrom to permaking it possibleto employ a wire of a re mit of mounting the other parts of the ativelylarge area of cross-section. heater, to be hereinafter described, in theA plurality of bus bars 34 may be suitcasing 12. The casing and the baseand top ably mounted in the lower part of the casing 12, as by beingsecured to blocks and 36, of refractory electric-insulating material.The ends of the resistor members 31 may be connected to the res ectivebus bars 34 by screws 37 A face p ate 38 of a suitable refractorymaterial may be secured against one side of the casing 12, as by screws39, and have mounted thereon a suitable control switch 40. Contactterminal pins 41 may also be mounted on the plate 38 and be connected tothe bus bars and to the control switch by suitable means to permit ofcon trolling the energization of the heating units. 1 a

By making the skeleton frames 22 and particularly the integral bridges29 thereof' of relatively small area of cross-section, it is possible tocause these members to glow when the resistor members 31 are traversedby a suitable electric current. By providing a skeleton frame having afront portion of ornamental and pleasing appearance, with a resistormember imbedde'd therein, heating units of pleasing and ornamentalappearance may be provided.

While I have illustrated a specific embodiment of a skeleton frame, I donot desire to be limited thereby and while the heating element has beenil ustrated as comprising a wire, it is, of course, understood that ahelically wound resistor member may be employed whereby it is possibleto concentrate a relatively large amount of eletric energy in a skeletonframe and a greater luminosity.

thereof may be obtained.

Various modifications and changes'may be made Without departing from thespirit and scope of my invention, and such modifications are intended.to be covered by the appended claims.

I claim as my invention: 1. An electric air heater comprising anelongated skeleton frame of refractory electric-insulating material anda resistor em bedded therein, the length of the resistor being greaterthan the length of the frame.

2. Anelectric air heater comprising a frame of refractoryelectric-insulating material havi' a plurality of integral members ofrelatively small area of cross-section, and a resistor member embeddedin said integral members.

3. An electric air heater comprising a frame of refractoryelectric-insulating material having a plurality of integral members ofrelatively small area of cross-section, and a resistor member embeddedin said integral members and adapted to be traversed by a current ofsuch value as to cause said integral members to become substantiallyradiant.

4. An electric air heater comprising a casing, a reflector plate ofrefractory material in said casing, a skeleton frame of refractoryelectric-insulating material in front of sai reflector, and a resistorembedded 1n said frame.

5. An electric air heater comprising a casing, a reflector plate ofrefractory mate rial in said casing, a plurality of skeleton frames ofrefractory electric-insulating material located in parallel-spacedrelation relatively to each other in front of said reflector plate andresistor members embedded in said skeleton frames.

In testimony whereof, I have hereunto subscribed my name this 27th dayof June,

JOSEPH H. PROCTER.

